ios - 如何正确错误处理在 swift 中找不到的 XCUI 元素

Question

我正在尝试为使用 XCUI 测试的 iOS UI 测试快速编写一个 do-try-catch。我正在阅读错误处理部分:https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/ErrorHandling.html#//apple_ref/doc/uid/TP40014097-CH42-ID508但是我不确定当找不到元素时应该抛出哪个错误。

func tapElement(string:String) throws {

    do{
        waitFor(app.staticTexts[string], 5)
        try app.staticTexts[string].tap()
    }
    catch {
        NSLog("Element was not found: \(string)")
        //how can i check specifically that the element was not found?
    }


}

....

func waitFor(element:XCUIElement, seconds waitSeconds:Double) {
    NSLog("Waiting for element: \(element)")
    let exists = NSPredicate(format: "exists == 1")
    expectationForPredicate(exists, evaluatedWithObject: element, handler: nil)
    waitForExpectationsWithTimeout(waitSeconds, handler: nil)
}

非常感谢任何帮助!!

Answer 1

你应该使用 element.exists 和 element.isHittable

element.exists 检查元素是否是 UIApplication/ScrollView/.. 的元素

element.isHittable 确定是否可以为元素计算命中点。

如果您不检查两者，element.tap() 会抛出以下错误，例如，如果元素位于键盘下:

Failed: Failed to scroll to visible (by AX action) TextField,...

示例代码:

let textField = elementsQuery.textFields.allElementsBoundByIndex[i]

if textField.exists && textField.isHittable {
    textField.tap()
} else {
     // text field is not hittable or doesn't exist!
     XCTFail()
 }